Wired-wireless system



April 24, 1934. K. wlLDE 1,956,368

WIRE? WIRELESS SYSTEM Filed March 18, 1931 vPatented Apr. 24, v1.1934

UNITED s'rivrizs 1,956,368 wmEmWmELEss SYSTEM Kurt Wilde, Berlin, Germany, assignor to Telefunken Gesellschaft fur Drahtlose Telegraphie m. b. H., Berlin, Germany, a corporation of Germany Application March 18, 1931, Serial No. 523,498 In Germany March 5, 1930 7 Claims.

The present invention relates to an arrangen-ent for radio frequency communication over What `is' here understood by communication sis any unilateral or bilateral transmission along lines by means of radio frequency currents, or, in other words, radio frequency telephony, teletransmission of instrument readings or service orders, automatic or prearranged teleoperation 10 0i' switches, relays, or the like. The wave-lengths heretofore used for this purpose have been limited, in the sense of longer waves essentially by the cost of choke coils and coupling means, and in the direction of shorter waves essentially by ,5 the losses occasioned in the condensers built up of hard paper or porcelain.

According to the present invention, the dinlculties heretofore known are avoided to a con sidera'ble degree. For coupling the radio fre- 22o quency transmitter equipment and the receiver, as well as for bridging or shunting transformers, breaks in the lines, and the like purposes, ric-- cording to the present invention, recourse is had to condensers comprising a dielectric con- 25 sisting of gas artiiicially kept at either an increased or a reduced pressure as desired, and in accordance with the use to which the condenser is to be put. For instance, condensers may, where desired. have a compressedmitrogen or 3g other suitable gas filling or else a vacuous space.

The principal advantage offered by the present invention resides in the fact that condensers of this type no longer cause measurable iosses so that far shorter 'wave-lengths than has heretoi'ore been permissible may be employed for` this traffic. This constitutes a progress in sev-` eral regards, because (1) owing to the increase in the wave-length range new paths of communication are opened; (2) the choke-coil means 40 are essentially reduced in cost; and (3) the new coupling condensers of this invention, because ,of the negligibly small weight of the dielectric material, are far lighter in weight, and in the case o! shorter carrier waves also much smaller than heretofore on account of the lower capacity that is required. Thisf-latter advantage is a factor vthat makes it possible to mount condensers of the type herein disclosed in power stations l or upon air-line poles already built.

'5o Y This invention has been shown in one of its preferred forms by the accompanying drawing which is to be taken as illustrative of the system and not in a limited sense.

-According to the invention, a high potential line is represented by the designation a and to (Cl. F75-41) this line at the terminal or binding post b is attached a conductor which connects the high potential line a with a condenser element housed within a glass envelope c. The condenser is formed of inner' and outer electrodes e and d 60 respectively. According to the preferred form of the invention, the inner electrode is connected by means of a lead f with the high potential transmission line and the outer electrode d is connected by means of a lead g with the radio frequency apparatus h which apparatus is in turn grounded at reception. The transmitter or receiver equipment designated as h may, o! course, be oi any general and well-known type.

Having now described my invention, what I 7o claim and desire to secure by Letters Patent is the following:

1. A condenser comprising an elongated vitreous envelope including a plurality of cylindrical electrodes, one of which electrodes is supported on the inner wail of said envelope, a rodlike internal support integral with one end of sai-d vitreous envelope and extending within said envelope and beyond the end of said first mentioned electrode, means for mounting another of said cylindrical 30 electrodes on said rod-like internal support, said last named electrode extending within said ilrst named electrode and spaced therefrom, a conductor passed through one end of said envelope and onnectedLto said first named electrode, a conductor passed through the other end oi the envelope Where said rod-like internal support is located and connected to said second named electrode, said enveiope containing a compressed gas t whichserves as a dielectric for the electrodes 9o therein.

2. A condenser comprising an elongated vitreous envelope including a pluraiity oi cylindri cal electrodes, one of which electrodes is support ed centrally on the inner wall ci said envelope, a rod-like internal support integral with one end o! said vitreous envelope and extending within said envelope. means for mounting another of said electrodes on said support, saidlast named electrode extending Within said iirst named electrode and spaced therefrom, a conductor passed through one end of said envelope and connected to said iirst named electrode, a conductor passed through'the other end of the envelope and con nected to said second named electrode.

3. A condenser comprising a cylindrical insulating casing having semispherioal ends, one of said ends having a depending rod-like electrode supporting member, metallic mounting and terminal members retained Within said semi- 110 spherical ends, a metallic tubular electrode surrounding the inner walls of said casing, and electrically connected to one of said terminal members, a second metallic tubular electrode having a flange-like end connected to the other terminal member and concentric with the rst mentioned electrode and supported by said depending rod-like electrode supporting member.

4. A condenser comprising a cylindrical insulating casing having semi-spherical ends, one of said ends having a rod-like electrode supporting member, metallic mounting and terminal members retained Within said semi-spherical ends, a metallic tubular electrode surrounding the inner Walls of said casing, and electrically connected to one of said terminal members, a second metallic tubular electrode having a flange-like end portion which is connected to the other terminal member and concentric with the first mentioned electrode and supported by said depending electrode supporting member.

5. A condenser comprising a cylindrical insulating casing-having semi-spherical ends, one of said ends having a depending rod-like electrode supporting member, metallic mounting and terminal members retained within said semi-spherical ends, two inner metallic tubular electrodes, the outermost one closely surrounding the inside of said casing and the innermost electrode being retained by a flange-like end portion and secured to said rod-like depending electrodeY supporting member, each of said electrodes being electrically connected to each of said terminal members.

6. A short wave radio frequency coupling condenser comprising a cylindrical glass envelope having semi-spherical ends, one of said ends having a depending rod-like electrode supporting member, metallic mounting and terminal supporting member extending within and beyond Y the semi-spherical end portion of said insulating casing, metallic mounting and terminal members retained within said semi-spherical ends, an outer metallic electrode surrounding the inner walls of said insulating casing and electrically connected to one of said terminal members, a second cylindrical metallic tubular electrode having a ange-like end, said flange-like end supported by and secured to said rod-like electrode supporting member and electrically connected to the other terminal member.

KURT WILDE. 

